Javascript AngularJS 动态注入作用域或控制器
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AngularJS dynamically inject scope or controller
提问by Mass
Is it possible to inject scope or controller during running ? or any other advice to dynamically inject services into controller ?
是否可以在运行期间注入范围或控制器？或任何其他建议将服务动态注入控制器？
Application.controller('IndexController', function($scope){
// some actions
if(someconditions) {
$scope.$inject = [someServiceName];
// and here i want to use service methods
}
});
Thanks in advance
提前致谢
回答by Mark Rajcok
A service can be dynamically injected (by name) into a controller using the $injector. Being able to inject services via controller arguments is just a convenience that Angular provides. Under the hood, the $injector is used by Angular to retrieve object instances. But we can use the $injector ourselves also.
可以使用$injector将服务（按名称）动态注入到控制器中。能够通过控制器参数注入服务只是 Angular 提供的一种便利。在幕后，Angular 使用 $injector 来检索对象实例。但是我们也可以自己使用 $injector。
function MyCtrl($scope, $injector) {
$scope.doSomething = function(someService) {
var service = $injector.get(someService) // someService contains the name of a service
service.value += 10
}
小提琴。
回答by MechanicalCoder
Following is one use case i came across recently, I was trying to inject the a service "myService" in the Factoy and got the following error.
以下是我最近遇到的一个用例，我试图在 Factoy 中注入服务“myService”，但出现以下错误。
**Uncaught Error:** *[$injector:cdep] Circular dependency found: $http <- $modal <- myService <- interceptorFactory <- $http <- $templateRequest <- $compile*
[http://errors.angularjs.org/1.3.0/$injector/cdep?p0=%24http%20%3C-%20%24mod%E2%80%A6orFactory%20%3C-%20%24http%20%3C-%20%24templateRequest%20%3C-%20%24compile][1]
To solve this issue, $injector came as life saver
为了解决这个问题，$injector 来作为救命稻草
var service = $injector.get('myService') //this will create a dynamic service instance
and now you can use the service in a similar way you have used other services in your application.
现在您可以像在应用程序中使用其他服务一样使用该服务。
